## LaTeX forum ⇒ Math & Science ⇒ How can I place a dash on top of a variable? Topic is solved

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Ca29
Posts: 2
Joined: Fri Jul 19, 2019 4:42 pm

### How can I place a dash on top of a variable?

Hi guys,

1 - I am trying to put a trace over variable to symbolize that it is constant.

2 - And I'm also trying to put a point on top of the variable to symbolize that the variable is a rate of change.

Ijon Tichy
Posts: 143
Joined: Mon Dec 24, 2018 10:12 am
\documentclass{article} \begin{document}Usual: $\mathrm{a}$ is a constant, not a variable.Unusual: $\bar{a}$ is a constant, not a variable. Usual: $\dot{a}$\end{document}

BTW: Something is either a variable or a constant. You should neither call is constant variable nor variable constant,
Last edited by Ijon Tichy on Sat Jul 20, 2019 1:50 pm, edited 1 time in total.

Ca29
Posts: 2
Joined: Fri Jul 19, 2019 4:42 pm
Thanks Ijon

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